Astronomy and Astrophysics – Astronomy
Scientific paper
Jan 1985
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1985rpeee...7....1m&link_type=abstract
In its USSR Rept.: Electron. and Elect. Eng. (JPRS-UEE-85-001) p 1-2 (SEE N85-22976 13-33) Transl. into ENGLISH from Izv. Vyss
Astronomy and Astrophysics
Astronomy
Cassiopeia A, Crab Nebula, Flux (Rate), Radio Sources (Astronomy), Errors, Radio Spectra, Radio Telescopes, Wave Diffraction, Wavelengths
Scientific paper
The title measurements made during August to October 1982 at the Staraya Pustyn polygon of NIRFI (Scientific-Research Radio Physics Institute) are described. The measurements were made with a 5 meter black disk in the Fresnel zone of a 12 meter radiotelescope. The disk, which filled a solid angle of 60 deg 7 min and stood at an angle of 20 deg to the horizon, was placed on a 25 meter tower 42 meters from the aperture plane of the radiotelescope. The radiation from the source was received with the radio focused at infinity. The following experimental parameters are tabulated: source flux, wavelength, diffraction correction, diffraction correction error, error in increment of calibration standard temperature, error determined by random sensitivity threshold, and a combined mean square measurement error. Spectra are plotted for Cassiopeia-A, Cygnus-A and the Crab Nebula.
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